Device for controlling the bight of the needle into the goods in blindstich sewing-machines.



PATENTED DEC. 3, 1907. L. ONDEEDONK. DEVICE FOR CONTROLLING THE EIGHT OF THE NEEDLE INTO THE GOODS IN BLINDSTITOH SEWING MACHINES.

APPLICATION FILED APR.9.1903.

2 SHEETS-SHEET 1.

No. 872,676. PATENTED DEC. 3, 1907.

E L. ONDERDONK. I DEVICE FOR CONTROLLING THE BIGHT OF THE NEEDLE INTO 'THE GOODS IN BLI'NDSTITOH SEWING MACHINES.

APPLIOATIQN FILED APR-9.1903.

UNITED STATES PATENT OFFICE.

LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR TO UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DEVICE FOR CONTROLLING Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed April 9, 1903. Serial No. 151,788.

To all whom it may concern;

Be it known that I, LANSING ONDERDONK, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful Improvements in Devices for Controlling the Bight of the Needle into the Goods in Blindstitch Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

My invention relates to an improvement in blind stitch sewing machines, and especially to those of the type having a siiitable work support over which the goods are placed and which contains the feeding mechanism, and a needle and looper operating above the work support, the needle passing. through the goods which are crimped over the work support. r

The partlcular'object of the present inventron Is to rovide devices for controlling the blght of t e needle into the goods in blind stitch machines and the broad invention forming the subject matter of the present case is illustrated in various forms whlch will be hereinafter referred to and particularly described. I

In a companion application, Serial Number 151,788 I have shown described and claimed a wheel feed for such machines which has a bight controlling feed ring this being a smooth surfaced, rounded or beveled edge ring piece that holds the material up to the needle, or in other words forms the apex over which the material to be sewed is held and which by its relation to the needle determines how deep a bight the needle take into the material.

In one form of the present invention 1. have varied the periphery of this ring or ridge by forming projections on it which are intended to raise the material higher at certain times than others, the object of which isto cause the needle to enter deeper into the material stitched at intervals. The same idea may be applied to a movable part or. single piece forming the bight controller which at intervals may cause the fabric to be crimped more than at others.

In the drawings of the present application I have illustrated several different forms of the invention; in one of which the feed is the usual four motion feed and is arranged to intermittently rotate a bight controlling ring having elevated point-s thereon.

In another form a four motion feed is used with a device for crimping the goods which at intervals rises above its normal position so as to give the needle a deeper bight into the goods.

It will be understood that in the latter construction the movable part may be when in normal position, the ridge or rib over -which the goods are crimped, or it may be a supplemental device which at intervals rises above the plane of the ridge forming rib. As to the first form mentioned, it will be understood that the bight controlling ring may itself normally operate as a ridge forming rib over which the stitches are formed and may have projections to raise the goods at intervals to cause the needle to take a deeper bight into the goods or it may be a rotating part adapted in the movement of the feed at certain intervals, to rise above the usual ridge forming rib which is on the work sup port. The invention consists in the matters hereinafter described and referred to in the appended claims.

In the drawings, which illustrate the invention, Figure 1, represents a sectional side elevation of so much of the blind stitch machine as is necessary to an understanding of my invention and illustrating one form of bight controlling device; Fig. 2, is a perspective view showing an enlarged detail of the bight controlling mechanism illustrated in Fig. 1; Fig. 3 is a view similar to Fig. 1 of an: other form of my invention; ,Fig. 4 is a view similar to Fig- 2 of the mechanism shown in Fig. 3; Fig. 5 is a side elevationof another modification; 6 is a sectional-end view of Fig. v5, and Fig. 7 is a sectional end View of another modification.

In these drawings which illustrate the invention, it will be understood'that the ma chine shown is of thc type illustrated in my various patents N granted February 17 th, 1903, 721,077 et seq. and that the feed dogs 53, the shafts u a, the ring 54, block 48, head 51' and pin 50, opening 49 and feed dog carrying arm 52 the needle lever N, the looper L are all similar to those heretofore constructed.

Referring first to Figs. 1 and 2, A represents a pitman rod which at its upper end is operatively connected with the driving shaft and at its lower end has a head B to which is attached one end of a crank C, fixed to the short shaft D carrying the cam E having the cam groove F therein in which groove runs a roller a on the end of the arm G pivoted at b and carrying on its outer end the bight controlling arm or member H which works up and down between the two parts 53 of the four motion feed dog. This stitch bight controlling member H may normally, even when in its lowest position project above'the work support and form a ridge forming rib, or as will be readily understood it may be used in connection with such a means for crimping the work as shown in my patents referred to, in which event it would only be necessary to allow themember H in its highest position to rise above the other crimping means. It is arranged and operated, however, so that at intervals and in proper time with the feed,'it will project above either its normal position or above the position of the stationary ridge .forming rib and thus crimp the goods more than at other times and cause the needle to take a deeper bight therein.

In Figs. 3 and 4, a modification of the means for operating the member H is shown, the crank C being connected with the rock shaft G which carries the member H at its outer end.

In Figs. 5 and 6, a modification is shown in which a stitch bight controlling ring I having a smooth surface rounded or beveled edge ring piece, is used which holds the material up to the needle and in connection with my application for patent on wheelfeed hereinbefore referred to such a stitch bight controlling device is preferable; It, however, is here shown as applied to a four motion feed, this ring being adapted to rotate in suitable ways formed on the work support and having teeth into which would mesh the teeth of'a small gear wheel K suitably operated from the driving shaft of the machine. This ring I is herein shown as provided atintervals with humps or projections e, which have the efiect at intervals of increasing the crimp in the goods, causing the needle to' take a deeper bight thereon. The controller is preferably mounted on the outside of and around the cylinder arm or work support, as

shown in Fig. 5, it being held in position by portions of rings on each side of it, which are secured to the support by screws as vshown. This bight controller also passes through an opening in the. four motion feed, as shown.

In Fig. 7 another modification is shown, in.

f which on the upward movement of the feed dog mesh into the notches of the. stitch bight controller and carry it along and release the same in the downward movement, thereby intermittently turning the bight-controller, while the feed dog travels backward and forward. This stitch bight controller shown in Fig. 7 is the same as that shown in Figs. 5 and 6 and has the humps e thereon. It will be understood, however, that so' far as the method ofoperating the stitch bight controller is concerned and which forms a part of my invention, it is immaterial whether the ring I be provided with projections or not, or whether it simply acts as a ridge forming rib over which the stitches are formed and I wish therefore, to include within the scope of my invention as distinguished from the wheel feed application above referred to, the means for operating a stitch bight controller from or in unison with the four motion feed device. And I also wish to include broadly the bight controller with means for causing it at intervals to increase the crimp in the oods, so that the needle may take a deeper bight therein.

Various minor modifications and changes may be made'without departing from the spirit of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:-

1. In a sewing machine having stitch forming mechanism including a needle, means for crimping the goods to enable the needle to take a bight therein, and means for automatically changing the position of the crimpa ing device, with respect to the goods, to vary the amount of crimp therein; substantially as described.

2. Ina sewing machine having stitch forming mechanism including a needle and means for crimping the goods to enable the needle to take a bight therein, a stitch bight controller with means for raising its operative position at intervals, with respect to the goods, to increase the amount of crimp therein, to enable the needle to take a deeper bight into said goods; substantially as described.

3. In a sewing machine having a work support, suitable stitch forming mechanism including a needle and a movable crimping member operating through the work support, to increase at intervals the amount of crimp in the goods and means for moving the crmiping member; substantiallyas described.

4, In a sewing machine having suitable stitch forming mechanism including a needle and means for crimping the goods including a ridge forming member operated by a moving part of the machine, with means for raising and lowering at intervals its operative point of engagement with the goods; substantially as described.

5. In a sewing machine having a work support and suitable feed dogs with means for operating them, stitch forming mechan: ism including a needle, and means for crimping the goods including a movable member 6. In a sewing machine having a work support, stitch forming mechanism including a needle and a crimping device for the goods including a; member with means 0 erable from a moving part of-the machine or rais- 1t ing and lowering it to increase or decrease the amount of crimp; substantially as described.

' In testimony whereof I affix mys' ature, in presence of'two witnesses.

LANSING ONDERDONK.

Witnesses:

W. L. SWIFT, F. A. NORTH. 

